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AS level physics 9702.
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AS level physics 9702.
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AS level physics 9702Newtons first law - correct answer-An object will remain at rest or keep traveling at constant
velocity unless it is acted on by a resultant force
Newtons second law - correct answer-The resultant force acting on an object is equal to the
rate of change of its momentum
Newtons third law - correct answer-When two bodies interact, the forces they exert on each
other are equal and opposite.
Name the 7 base units - correct answer-meter, kilogram, second, ampere, kelvin, mole,
candela
Systemmatic error - correct answer-an error in readings which is repeated throughout the
experiment
Accuracy - correct answer-an accurate value of a measured quantity is one which is closer
to the true value of the quantity
Precision - correct answer-the smallest change in value that can be measured by an
instrument or an operator
Random error - correct answer-Inaccuracies when taking measurements
What causes upthrust - correct answer-Upthrust arises from the pressure which a fluid
exerts on an object. When there is more pressure on lower surface than the upper surface.
What is a newton - correct answer-Force required to accelerate 1kg of mass by 1ms⁻²
weight on a slope - correct answer-w=mgsinθ
Define center gravity - correct answer-The point where all the weight of the object may be
considered to act.
Define moment - correct answer-Product of force and the perpendicular distance from the
pivot in which the force is acted upon
Define a couple - correct answer-Two parallel forces that are equal in magnitude, acting in
an opposite direction to create a turning effect but not causing the object to accelerate.
How to calculate torque of a couple - correct answer-One of the forces x perpendicular
distance between the forces
Conservation of energy - correct answer-Energy cannot be created or destroyed, it can only
be converted from one form another.
, Define Watt - correct answer-The rate of transfer of energy of one joule per second
Conservation of momentum - correct answer-total momentum in a system before and after
the collision will remain constant unless acted on by an external force
Perfectly elastic collision - correct answer--Both momentum and kinetic energy are
conserved.
-Relative speeds before and after stay the same.
Inelastic collision - correct answer-Momentum is conserves however kinetic energy is not
conserved because it is lost due to deforming the two objects.
How to know if a material obeys Hooke's law - correct answer-If the extension produced in it
is proportional to the applied force.
Hooke's law equation - correct answer-F=kx
Elastic potential energy - correct answer-E = 0.5Fx E = 0.5kx²
Define electric fields - correct answer-a region of space where a force acts on a stationary
charge
On electric fields which direction does the charge travel. - correct answer-From positive to
negative
Define electric field strength - correct answer-The force per unit charge exerted on a
stationary positive charge at that point.
Define coulomb - correct answer-The charge which flows past a point in a circuit in a time of
1s when the current is 1A
What is Ohm's law - correct answer-The current in a component is proportional to the
potential difference across it provided physical conditions stay constant.
Define Ohm - correct answer-Volt per ampere
Define resistivity - correct answer-The resistance of a material of unit cross sectional area
and unit length
Resistivity Equation - correct answer-R = ρL/A
Define electromotive force - correct answer-The total work done when unit charge moves
round a complete circuit
Define internal resistance - correct answer-Resistance to current flow within the power
source; reduced p.d. when delivering current
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